using System;
public class Program
{
public static void Main()
pstatic double f(double a, double b)
double i = 1;
double kq = 1;
while ( i <= a && i <=b )
if (a % i == 0 && b % i == 0)
kq = i;
}
i++;
return kq;
double n = 4;
double m = 16;
Console.WriteLine(f(n,m));